MNT: Change wheel directory on Travis
MNT: Change wheel directory on Travis

This should keep the wheels from getting deleted when Travis cleans up
for deploying releases. Deleting them otherwise causes them to be
"re-downloaded" when building the final wheels, resulting in mass
upload to S3 on release.
ahaberlie/MetPy,ahaberlie/MetPy,dopplershift/MetPy,Unidata/MetPy,ShawnMurd/MetPy,Unidata/MetPy,dopplershift/MetPy